Punch-press guard.



F. S. ALIANO.

PUNCH PRESS GUARD.

APPLICATION FILED MAY 6. 1914.

Patented J an. 11, 1916.

m A MW M 6 2M WW fig w 6 m @lElFllQE FRANK S. ALIA'NO, OF NEW YORK, N.Y.

.PUNCH-,PRE$$ GUARD- To aZZ 20 7mm it may concern Be it known that I,Fran-1; S. ALIANO, a citizen of the United States, residing in theborough of Brooklyn, city of New York, county of Kings, and State of NewYork, have inventedcertain new and useful Improvements in PunchPressGuards, of which the following is a specification, ref erence being hadtherein to the accompanying drawings, which form a thereof.

My invention relates to punch press guards and more particularly to atype of guard especially adapted for use upon hand fed presses.

The guard made the subject matter of my present invention is of a typeespecially adapted for use with a press in which it is necessary for thepressman to hold the work upon an anvil or die while the ram isdescending and until it has completed the worl; to be done or until theremoval of the work from the press. A guard of this type must be sopositioned normally as to permit the work to be readily fed upon theanvil and be capable of such actuation prior to or during the descent ofthe ram as to prevent the hand of the operator remaining between theanvil and the ram while permitting the operators hand or hands to remainbeneath the anvil for the purpose of holding the work thereupon,

A guard made in accordance with my invention is adapted, by anoscillatory movement, to be automatically interposed between the surfaceof the anvil presented toward the ram, and the operator, leavingsufficient clearance below the guard, when set, however, to still permitthe operator to hold the work properly in position upon the anvil. Theguard will also be returned to normal prior to the succeeding actuationof the press so as to permit the removal of the work from the press andthe feeding of another piece of work thereto.

I also aim to so mount the oscillatory plate with relation to the pressas to permit a quick adjustment of the oscillatory plate with relationtothe anvil or the convenient substitution of a plate of one size for thatof another.

A further feature of the invention is that construction of the plate, byreason of which the operator is forced to insert his hand directly belowthe portion of the plate intermediate the side edges thereof in order tohold the wen-kin position.

Specification of Letters Patent.

plate upon a I shown, consists Patented J an. 11, 1916.

Application filed. May 6, 1914 Serial No. 835,616.

The invention consists primarily in a punch press guard embodyingtherein an oscillatory guard plate normally projecting downwardly towardthe press and above the die and between the ram and the operator andmeans whereby said guard plate may be swung downwardly and toward theoperator to bring the lower edge of said plane below the top surface ofthe die; and in such other novel features of construction andcombination of parts as are hereinafter set forth and described and moreparticularly pointed out in the claims hereto appended.

Referring to the drawings: Figure 1 is a side elevation of a punch pressshowing my guard. applied thereto; Fig. 2 is a front view thereof; andFig. 3 is a'detail perspective view of the guard mechanism and a portionof the press adjacent thereto.

Like letters refer to like parts throughout the several views,

In the embodiment of my invention shown in the drawings, a indicates theframe of a press; and Z) the fly wheel adapted to be connected with theeccentric shaft 0 by the usual clutch mechanism, not shown. Mounted invertical guides (Z is the reciprocatory ram 0. Below the guides (Z andram 6 is an anvil or die 7 which in the form of press of a cylindricalbody adapted to receive a can body for the purpose of having the sidelap formed thereon. This anvil is supported from the frame a. in theusual manner.

The type of press described above is old and welldrnown in the arts andforms no part of my invention. I have illustrated my invention inconnection with this type of press because it has particularadaptability thereto. It is to be understood, however, that a guard madein accordance with myinvention may be advantageously used on other typesof presses, and that I do not intend to restrict myself to the use ofthe guard upon any particular type of press.

The guard mechanism proper, comprises an oscillatory plate 9, thepivotal supports for which. are arranged above the plane of the top ofthe anvil or die 7 andupon a vertical plane between the ram 6 and thepressman. Normally, the plate 9 is pro jected downwardly from itssupport and away from the operator toward the anvil or the angle of suchprojection being such as to bring at least a portion of this plate abovesaid anvil or die to an extent to afford that clearance above said anvilor die necessary to permit the can bodies or other articles to bereadily fed with relation to the punch and die, and removed after theoperation of the press.

That portion of the plate 9 adjacent the anvil or die 7 is of a width sothat, when said plate is swung toward the operator, the lower edgethereof will extend below the plane of the anvil or die f and thusprevent the hand of the operator remaining be tween the punch and theanvil or die. At the same time the operator may readily pass his handbelow the guard and hold the work upon the anvil or die by grasping itbelow the point of engagement of the punch with the work.

To prevent the operator passing his hand about either side of the plate9 and insert it beneath the ram. I extend said plate laterally thereofwell beyond each side of the anvil or die. I also preferably form thisplate with the recessed portion 9 forming the side extensions 9 -17adapted to projeet upon opposite sides of the anvil or die f when theguard plate is in its normal position.

In mounting the guard upon a press, I utilize a supporting mechanismwhich will admit convenient attachment to the frame a and permit theplate to be readily adjusted in its supports, or removed therefrom, toadapt the guard to any particular anvil or die, or different sizedpresses. I also preferably provide for the adjustment of the plate withrelation to its supports. This supporting means comprises the bracketshh secured at opposite sides of the frame ,a. Carried by the oppositeforward ends of said brackets are the vertically adjustable screw studsi-j, secured in position in any desired manner as by the lock nuts z"j'.Carried by each stud i-j is a bearing block is or having an openingtherethrough adapted to receive said stud, the end of said blocks beingslotted as shown to permit it to be firmly clamped upon its stud. By theuse of this construction. I am enabled to adjust said blocks verticallyupon their studs, or to remove the plate without disturbing the studs ortheir supporting brackets. This construction also facilitates theinstallation of the guard.

The blocks l:-/c are each provided with a horizontal bearing in which isrotatably mounted a shaft m having a crank arm m at one end thereof.Carried by said shaft is a head 71 preferably of cast metal, having anopening therethrough adapted to inclose the shaft m and a split top n bymeans of which the' 'head may be adjusted with relation to the anvil ordie and clamped upon said shaft by means of clamp screws as shown. Theplate 9 is mounted upon said head a by means of the bolts n said platebeing provided with a plurality of spaced bolt holes to facilitate theadjustment of the plate with relation to said head. One 1 side of thehead is made flat so as to permit this adjustment of the plate thereon.

Mounted upon a stud upon the frame a, is a bell crank lever one arm 0 ofwhich is connected to the crank arm m by the link 79; and the other arm0 of which is connected by the link (1 with the clutch mechanismcontrolling the operation of the ram 6 and also by the link 7'- with thefoot pedal 8 or other means for controlling said clutch mechanism. Bythis construction the operation of the guard may be accurately timedwith relation to that of the ram. By using a lost motion connectionbetween the arm 0 and the link the guard may be set before the clutch istripped. In the form of the invention shown, the spring 8 acting uponthe pedal .9 may be utilized for restoring the plate 9 to normal aftereach actuation of the press, although, if desired, other means forrestoring said plate to normal may be used without departing from thespirit and scope of the invention.

The operation of the herein described device is as follows: When thepress is at rest the oscillatory guard plate Q will be in the positionshown in Fig. 1, the side extensions g thereof, extending upon oppositesides of the anvil or die 6 and the recess intermediate said extensionspositioned above the die or above the normal plane of the die. With theguard in this position a can body or other piece of work may be readilyfed upon the anvil or die and between it and the guard plate. When thework is in place the operator depresses the pedal 8 against the tensionof its spring 8, thus rocking the bell crank lever 0 and through thelinks p g, successively imparting oscillatory movement of the plate 9and tripping the clutch controlling the ram 6. As the plate ,7 isoscillated it will swing downwardly and toward the operator until thelower edge thereof intermediate the extension g-g will come to positionin a below the top surface of the anvil or die, thus effectivelyguarding the space above said anvil or die. The extensions g'g willserve to effectively prevent the operator inserting his hand beneath theguard and upwardly at one side of the anvil .or die. While the plate 7will effectively protect the space between the anvil or die and the ram,it will still permit the hand of the operator to be inserted below thatportion of the plate adjacent the anvil or die for the purpose ofholding the work upon said anvil or die until the lap or other work isapplied and it is necessaryto remove the work.

If it be desired to adjust the plate 5/, such adjustment may be securedby releasing the clamping blocks lrk and raising and lowering them uponthe studs 2' If desired, the studs '2'j may be adjusted, the said blocksbeing released to permit the free adjustment of said studs and avoidrotary movement of said blocks. a

By the use of the studs z'j and blocks -70 the guard may be readily andconveniently applied to a press and it may be quickly adjusted.

Upon the reversal of the movement of the 7 ram, the clutch mechanism,bell crank lever 0-0 and pedal 8 will be restored to normal, thuscarrying the guard plate 9 to its normal position and affording thatclearance necessary to permit the removal of the work from the press.

It is not my intention to limit the invention to the precise details ofconstruction shown in the drawings, it being apparent that such may bevaried without departing from the spirit and scope of my invention.

Having described my invention what I claim as new and desire to haveprotected by Letters Patent is 1. A punch press guard embodying thereinan oscillatory guard plate normally projecting downwardly toward thepress and above the anvil or die and between the ram and the operator,manually operative means whereby the movement of the ram of a press iscontrolled and operative connections between said means and saidoscillatory guard plate whereby said guard plate may be swung downwardlyand toward the op erator to bring the lower edge of said plate upon aplane below the top surface of the anvil or die.

2. A punch press guard embodying therein an oscillatory shaft and guardmounted thereon and movable therewith, said plate normally projectingdownwardly toward the press and above the anvil or die and between theram and the operator, a bell crank lever, a plurality of links wherebyone arm of said lever may be connected to the controlling pedal and theclutch mechanism, a crank arm carried by said oscillatory shaft and alink connection between the other arm of said bell crank lever and saidcrank arm whereby the depression of the pedal to said clutch will swingsaid plate downwardly and toward the operator to bring the lower edgethereof upon a plane below the top surface of the anvil or die.

8. A punch press guard embodying therein an oscillatory guard platenormally projecting downwardly toward the press and above the anvil ordie and between the ram and the operator, said plate having thereonextensions disposed to the opposite sides thereof and adapted tostraddle the anvil or die whereby the work may be held upon said anvilor die beneath said plate but access tosaidanvil or die about the sidesbearing block adapted to be mounted upon each of said studs, meanswhereby each of said blocks may be clamped upon its stud, an oscillatoryshaft the opposite ends of which are mounted in said blocksrespectively, a guard plate mounted upon and movable with said shaft,said plate normally projecting downwardly toward the press and above theanvil or die and between the ram and the operator and means whereby saidguard plate may be swung downwardly. and toward the operator to bringthe lower edge of said plate upon a plane below the top surface of thedie.

5. A punch press guard embodying therein a plurality of brackets adaptedto be disposed upon opposite sides of a press, screw studs mounted insaid brackets respectively, means whereby each of said blocks may beclamped upon its stud, an oscillatory shaft the opposite ends of whichare mounted in said blocks respectively, a guard plate mounted upon andmovable with said shaft, said plate normally projecting downwardlytoward the press and above the anvil or die and between the ram and theoperator and means whereby said guard plate may be swung downwardly andtoward the operator to bring the lower edge of said plate upon a planebelow the top surface of the die.

6. -A punch press guard embodying therein an oscillatory guard platenormally projecting downwardly toward the press and above the die andbetween the ram and the operator, supporting means for said platewhereby the angle or projection of said plate may be adjusted, manuallyoperative means whereby the movement of the ram of a press is controlledand operative connections between said means and said oscillatory guardplate whereby said guard plate may be swung downwardly and toward theoperator to bring the lower edge of said plate upon a plane below thetop surface of the anvil or die.

7. A punch press guard therein an oscillatory shaft, a head clampthereon, a guard plate carried by said head, said plate normallyprojecting downwardly toward the press and above the die and between theram and the operator, manually operative means whereby the movement ofthe ram of a press is controlled and operative connections between saidmeans and said oscillatory guard plate whereby said guard plate may beswung downwardly and embodying toward the operator to bring the loweredge therein an oscillatory shaft, a head clamp thereon, a guard platecarried by said head, said plate normally projecting downwardly towardthe press and above the anvil or die and between the ram and theoperator, an

operative Connection between said plate and 10 said head whereby saidplate may be adjusted radially of said shaft.

In witness whereof I hereunto affix my signature this 1st day of May,1914:.

, v FRANK S. ALIANO. \Vitnesses F. O. VVEN'rwoRTH, JUDITH PARDEE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C, 1

